libstdc++-v3/testsuite/27_io/basic_ostream/inserters_other/wchar_t/5.cc

   1 // Copyright (C) 2005-2018 Free Software Foundation, Inc.
   2 //
   3 // This file is part of the GNU ISO C++ Library.  This library is free
   4 // software; you can redistribute it and/or modify it under the
   5 // terms of the GNU General Public License as published by the
   6 // Free Software Foundation; either version 3, or (at your option)
   7 // any later version.
   8
   9 // This library is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU General Public License for more details.
  13
  14 // You should have received a copy of the GNU General Public License along
  15 // with this library; see the file COPYING3.  If not see
  16 // <http://www.gnu.org/licenses/>.
  17
  18 // 27.6.2.5.3 basic_ostream manipulator inserters
  19 //
  20 // _GLIBCXX_RESOLVE_LIB_DEFECTS
  21 // DR 60. What is a formatted input function?
  22 // Inserters for manipulators do not behave as formatted output functions.
  23
  24 #include <ostream>
  25 #include <stdexcept>
  26 #include <testsuite_hooks.h>
  27 #include <testsuite_io.h>
  28
  29 std::wostream& func1(std::wostream&)
  30 { throw std::runtime_error(""); }
  31
  32 std::wios& func2(std::wios&)
  33 { throw std::runtime_error(""); }
  34
  35 std::ios_base& func3(std::ios_base&)
  36 { throw std::runtime_error(""); }
  37
  38 template<typename T>
  39 void test(T& (*f)(T&))
  40 {
  41   __gnu_test::sync_wstreambuf buf;
  42   std::wostream os(&buf);
  43
  44   __gnu_test::sync_wstreambuf buf_tie;
  45   std::wostream os_tie(&buf_tie);
  46
  47   // No sentry should be constructed so os.tie()->flush() should not be
  48   // called.
  49   os.tie(&os_tie);
  50
  51   try
  52     {
  53       os << f;
  54       // Exceptions thrown by f should not be caught
  55       VERIFY( false );
  56     }
  57   catch (std::runtime_error&)
  58     {
  59     }
  60
  61   // Exceptions thrown by f should not cause badbit to be set
  62   VERIFY( os.good() );
  63   VERIFY( !buf_tie.sync_called() );
  64
  65   // The manipulator should be called even if !os.good().
  66   os.setstate(std::ios_base::eofbit);
  67
  68   try
  69     {
  70       os << f;
  71       // Exceptions thrown by f should not be caught
  72       VERIFY( false );
  73     }
  74   catch (std::runtime_error&)
  75     {
  76     }
  77
  78   // Exceptions thrown by f should not cause badbit to be set
  79   VERIFY( os.rdstate() == std::ios_base::eofbit );
  80   VERIFY( !buf_tie.sync_called() );
  81 }
  82
  83 void test05()
  84 {
  85   test(&func1);
  86   test(&func2);
  87   test(&func3);
  88 }
  89
  90 int main()
  91 {
  92   test05();
  93   return 0;
  94 }